1600x1200 Resolution not possible (DVI,nvidia)

[hanzi]

hiho gentoo users!

I got some troubles with my new Geforce 6800 Non-Ultra.
It's not possible for me to select higher resolutions than 1280x1024 in my xorg config.
If i select 1600x1200 in my xorg.conf my Monitor shows that it only uses 1280x1024 resolution.
Another Problem is that the bottom and a piece of the right side of my screen are cut off.

Specs:
LG Flatron L2010P (can do 1600x1200 Resolution)
Connected via DVI-D


graphics: Geforce 6800 Non-Ultra
Mainboard: AOpen i855-GMEm-LFS


and here is my xorg.conf:

[loisl]

When Your graphics board and Your monitor support analogue VGA ports as well then try the analogue ones instead of the DVI port.

I have a ThinkPad T42p laptop with a 1600x1200 display connected (unfortunatedly IBM ships with a ATI Radeon FireGL and not with nVidia ) and a portreplicator with DVI- and analogue VGA port in my office. My monitor in the office supports only 1280x1024 .

When the laptop is docked the only way to get anything to show up on the external monitor is to use the analogue VGA port when I boot xorg-x11.

[drumz]

Don't know if it's the same for your situation, but on my laptop I had a similar problem where I couldn't get higher resolution. I had to add the horiz/vert refresh rates, then it worked:

https://forums.gentoo.org/viewtopic.php?t=281091&highlight=

[hanzi]

[hanzi]

i just got a new GeForce 6800 Ultra.
But same Problem here.
Has anyone a idea who to solve this?

[loisl]

Hai,

I have set up my xorg.confg to change the sync-freq's by pressing Ctrl+Alt+<+ from the num pad> (should be default for all X-Servers until You decide to forward this keystrokes to an application).

Pressing this keystrokes several times shifts throug all possible configured frequencies. Maybe Your display will "enlighten"

If You set up Your monitirs on-screen display properly, it will show You the choosen resolution/freq combination for a few seconds (works fine with mine)

Good luck,
Loisl

[holiday]

I had the same problem. Changing the colordepth from 24 to 16 did it - but I still don't no why (for 1600x1200 resolution)

May be it helps for you too

[hanzi]

none of your tipps worked for me.
i tried them all.

If someone has another idea, please post it.
I will try everyting because i _want_ this thingy to work @ 1600x1200

[mark_lagace]

Could you post your /var/log/Xorg.0.log file? It might provide some insight into why it fails to start up in 1600x1200 resolution.

One possibility is that the DDC info from your monitor is not being interpreted correctly and thus Xorg doesn't believe your monitor can do the selected resolution. You could try to add the following line in your nvidia Device section of the xorg.conf:

[hanzi]

Added the Option you told me.
(Added the Syncrates as they appear in my Handbook)
Restarted X Server --> didn't work


...and here's the Xorg.0.log you requested:

[mark_lagace]

I think you made a typo when you added the NoDDC option since it is still getting loaded:

[Archangel1]

I'd suggest adding a couple of lines to your Monitor section, like so:

[hanzi]

Fixed the typo and edited my last post.

It shows now the Xlog.0.log and the xorg.conf file.

The NoDDC Option didn't help me.

[mark_lagace]

What happens when you try to start up X now? From the Xorg.0.log file everything looks like it started up in 1600x1200 resolution:

[hanzi]

when i start x - fluxbox appears (as it should)
My TFT (LG Flatron L2010P) shows me that it's running in "1280x1024" Resolution.
And all the bottom and the right side of the Screen are cut of.
So i don't see the fluxbox Panel for switching between windows.

maybe this is a nvidia-kernel bug:
because: when i use the vesa driver everything works fine @ 1600x1200 Resolution.
But i did not buy a 6800 Ultra for useing the Vesa driver

[mark_lagace]

OK, that has me really confused...

I looked up the specs for your monitor (here) and noticed that you have the HorizSync and VertRefresh rates slightly off. Your HorizSync should be 30-96 and your VertRefresh should be 56-85.

I'm not sure that that will help, since theoretically with the settings you have it should be displaying at 1600x1200 at 60 Hz vertical (75kHz horizontal) which is within the specs you've put. Still, it can't hurt to have the proper specs put in.

Beyond that, I'm at a loss to figure out what is going on.

EDIT: I just saw your comments about using the VESA driver and having things work at 1600x1200. At least that narrows the problem down to the nvidia drivers... maybe you can find some help in the nvidia linux driver forums --> here

[hanzi]

The Sync Rates you posted are in my Handbook too, but they seem to be only for the Analog VGA.
My Sync Rates worked well with other graphics Cards.

By the way:
i just built an old geforce fx 5900XT in this System.
Everything worked perfecly

So i think my Mainboard could be incompatible with the 6800-Series from nvidia or something..

Under Windows i had the same Problems like unter Linux.
But i solved them by installing new drivers (71.40 Series..)


I will try asking in the nvnews forums.
Thanks for your help mark lagace.

[rolweber]

Hi,

my problem matches this thread perfectly, though it is not exactly the same as the one posted originally.
I am trying to display a 1600x1200 resolution via DVI cable using framebuffer (nvidia, vesafb-tng) or X (nv and nvidia).
No luck whatsoever, the only resolution I can get via DVI is 1024x768.

Motherboard: ASUS P5WD2 Premium
Video: nVidia 6600 GT (PCIe)
Monitor: NEC MultiSync 2170 NX

My latest attempts today have focused on the nvidia framebuffer driver. I have upgraded to kernel sources 2.6.14-gentoo-r2. When I grep for 'nvidiafb' in /var/log/dmesg, this is what I get:

[chunderbunny]

Which version of the nvidia-kernel package are you using? Try upgrading to the ~x86/~amd64 version and see if that helps.

[fatcat.00]

I am running a 6800 GT at 1920x1200 on a Dell 2405FPW LCD over the DVI connector. I had to specifiy a modeline to get this to work at this high resolution and at a 16:10 aspect ratio. I am not sure if modelines (modeline generator here: http://xtiming.sourceforge.net/cgi-bin/xtiming.pl) are necessary only when using an LCD, or if it works for CRTs as well. Not sure if you are using a CRT or an LCD. Anyway, here are the important bits from my xorg.conf:

[rolweber]

Hi chunderbunny, fatcat.00,

thanks for your suggestions. I had another go at it, though with the same results before.

chunderbunny, the version of media-video/nvidia-kernel is 1.0.6629-r4. I have not found any ~x86 version of the package. The temporary path that emerge used for nvidia-kernel included an -x86- element in one of the directories, so I guess that was auto-detected.

fatcat.00, I reworked my xorg.conf based on your example, the nvidia docs, and the instructions in http://www.gentoo.org/doc/en/nvidia-guide.xml. I made sure to recompile the kernel without framebuffer support because I read somewhere that the closed source nVidia driver doesn't like framebuffers. I re-emerged nvidia-kernel afterwards. So far, so good. Only it didn't work. This is what the Xorg log says (shortened):

[fatcat.00]

When you load the nvidia kernel module, you should get /dev/nvidia0 and /dev/nvidiactl. Do you? If you do, do an ls -l /dev/nvidia* and note the permissions on the files...your problem is so strange that we have all probably just missed something rather small and niggling.
_________________
-- Fatcat

[rolweber]

Hi Fatcat,

it took me a while to start another attempt. You seem to have nailed down the problem.
I don't get /dev/nvidia* even though the 'nvidia' kernel module is listed by 'lsmod'.
At least now I know what to search for.

thanks,
Roland

[rolweber]

BINGO!